my cousin is a ____boy.A.16 years old B.c.16-years-old d.16-year old

问题描述:

my cousin is a ____boy.A.16 years old B.c.16-years-old d.16-year old

答案为D.这种句子有这两种常用表达:he_is_a_16-year-old_boy或者he_is_16_years_old,注意16-year-old相当于一个形容词.(手机作答,见谅)